dockerfile: use lld linker for containerd build #5518

Job	Run time
build (windows/amd64)	2m 43s
build (windows/amd64)	2m 43s
build (freebsd/amd64)	2m 35s
build (freebsd/amd64)	2m 35s
sandbox-build (linux/amd64)	7m 15s
sandbox-build (linux/amd64)	7m 15s
sandbox-build (linux/arm64)	6m 42s
sandbox-build (linux/arm64)	6m 42s
test-freebsd-amd64	2m 33s
test-freebsd-amd64	2m 33s
test-windows-amd64 (containerd, ./client)	4m 49s
test-windows-amd64 (containerd, ./client)	4m 49s
test-windows-amd64 (containerd, ./cmd/buildctl)	3m 2s
test-windows-amd64 (containerd, ./cmd/buildctl)	3m 2s
test-windows-amd64 (containerd, ./worker/containerd)	3m 19s
test-windows-amd64 (containerd, ./worker/containerd)	3m 19s
test-windows-amd64 (containerd, ./solver)	3m 21s
test-windows-amd64 (containerd, ./solver)	3m 21s
test-windows-amd64 (containerd, ./frontend)	1m 45s
test-windows-amd64 (containerd, ./frontend)	1m 45s
test-windows-amd64 (containerd, ./frontend/dockerfile)	35m 10s
test-windows-amd64 (containerd, ./frontend/dockerfile)	35m 53s
test-windows-amd64 (./..., 1)	5m 7s
test-windows-amd64 (./..., 1)	5m 7s
	2h 37m 25s

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